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A042651 Denominators of continued fraction convergents to sqrt(855). 2
1, 4, 25, 104, 6057, 24332, 152049, 632528, 36838673, 147987220, 924761993, 3847035192, 224052803129, 900058247708, 5624402289377, 23397667405216, 1362689111791905, 5474154114572836, 34207613799228921, 142304609311488520, 8287874953865563081 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 6082, 0, 0, 0, -1).

FORMULA

G.f.: -(x^2-4*x-1)*(x^4+26*x^2+1) / ((x^4-78*x^2+1)*(x^4+78*x^2+1)). - Colin Barker, Dec 20 2013

MATHEMATICA

Denominator[Convergents[Sqrt[855], 30]] (* Vincenzo Librandi, Jan 26 2014 *)

CROSSREFS

Cf. A042650, A040825.

Sequence in context: A231175 A082044 A167889 * A225692 A070764 A244746

Adjacent sequences:  A042648 A042649 A042650 * A042652 A042653 A042654

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Colin Barker, Dec 20 2013

STATUS

approved

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Last modified November 18 07:01 EST 2018. Contains 317279 sequences. (Running on oeis4.)